Notes

The files found in the MedAscii directory of the MedDRA release
contain the complete current MedDRA data set.
Metathesaurus source processing requires only these files. The
consecutive files, found in the SeqAscii directory, define what changes
have been made in the MedDRA ASCII files since the last release.
These files are not directly used for Metathesaurus source processing,
except in limited cases to informally review updates or to confirm file
integrity (e.g., as an exercise to verify that by applying current .seq
changes to previous .asc data, the current .asc files can be
recreated).

The information provided here applies explicitly to the English
version of MedDRA, however the majority of it is also relevant to most
MedDRA translations (Czech, Dutch, French, German, Hungarian, Italian, Portuguese
and Spanish).
The Japanese translation of MedDRA has significant differences.
For additional information about the translations, see the representation pages for each specific source.

Source-Provided Files: Details

file:llt.asc

Lower Level Terms, represented with TTY="LT" or "OL" (for
non-current LLTs). Every PT has one identical LT for data entry
purposes. In addition, LTs may be synonyms, lexical variants,
quasi-synonyms, or
sub-elements of their PT.Therefore, the pt_code is represented in
MRCONSO as a Source-asserted
Descriptor Identifier (SDUI), indicating that the LT and PT are closely
related but not necessarily synonymous.

file:smq_content.asc

Used to create a "has_member" relationship between the SMQ
and its members

2

Term_code

Subordinate term code; it could be a code for a MedDRA PT,
LLT or child SMQ

Used to create a "has_member" relationship between the SMQ
and its members

3

Term_level

MedDRA hierarchy level of the term (4 = "PT", 5 = "LLT") or
0 for a
child SMQ

MRSAT: ATN = "SMQ_TERM_LEVEL"

4

Term_scope

Defines the MedDRA term as a member of the broad scope (1),
narrow scope (2) of the SMQ search, or a child SMQ (0) (zero)

MRSAT: ATN = "SMQ_TERM_SCOPE" Attached to the RUI

5

Term_category

The category is assigned a single alphabetical letter
depending on the algorithm applied. If the SMQ does not use algorithms,
then all Term_category values are assigned "A." For a child SMQ, this
field is assigned "S."

MRSAT: ATN = "SMQ_TERM_CAT" Attached to the RUI

6

Term_weight

Term weight is used for some SMQ algorithms. "0" is used as
default.

MRSAT: ATN = "SMQ_TERM_WEIGHT" Attached to the RUI

7

Term_status

Identifies a term as active within this SMQ or inactive
within this SMQ. When a term is added to an SMQ, the value is set to
"A" for Active. The term can be flagged as "I" for inactive if the term
is no longer used in the SMQ.

MRSAT: ATN = "SMQ_TERM_STATUS" Attached to the RUI

8

Term_addition_version

Identifies the version of MedDRA in which this term was
added to the SMQ

MRSAT: ATN = "SMQ_TERM_ADDVERSION" Attached to the RUI

9

Term_last_modified_version

Identifies the version of MedDRA in which this term was last
modified in this SMQ.